Move scripts dir inside hm

And remove weird path contraptions

hm/scripts/cleandev

@@ -0,0 +1,18 @@
+#!/usr/bin/env nix-shell
+#! nix-shell -i bash --pure
+#! nix-shell -p bash findutils git gnumake
+
+# Removes files that can be regenerated
+# from a dev environment
+
+find . -type d -name bower_components -or -name node_modules -print0 | while read file; do
+    rm -rf "$file"
+done
+find . -type f -name Makefile -print0 | while IFS= read -r -d '' file; do
+    echo "--> $file"
+    (cd "${file//Makefile}"; make clean)
+done
+find . -type d -name .git -print0 | while IFS= read -r -d '' dir; do
+    echo "--> $file"
+    (cd "$dir"; git gc)
+done